@book { DieWeltwirtschaftskrise1932,
    title = "Die Weltwirtschaftskrise 1932",
    author = "Stefan {Potratz}",
    year = "2002",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640037780",
    url = "https://www.hausarbeiten.de/document/105485"
}